RS Pro Manual Control Valves. Features and Benefits. When off, the 3 way direction control valve discharges the residual pressure and blocks airflow It switches air pressure devices by simply turning the handle (on/off) Maintenance or inspection is possible when the remaining pressure in the device is removed A 3 way valve discharges the remaining pressure and blocks the incoming air in the off state There are 4 types available depending on the way it is applied to the air pressure flow Applicable fluid type, air (no other type of gas or liquid) Working pressure range 0 to 150 psi Working temperature range 0 to 60 °C